diff --git a/testing-common/src/main/java/io/opentelemetry/instrumentation/testing/junit/InstrumentationExtension.java b/testing-common/src/main/java/io/opentelemetry/instrumentation/testing/junit/InstrumentationExtension.java
index c2680b3764d1..0426436e91d8 100644
--- a/testing-common/src/main/java/io/opentelemetry/instrumentation/testing/junit/InstrumentationExtension.java
+++ b/testing-common/src/main/java/io/opentelemetry/instrumentation/testing/junit/InstrumentationExtension.java
@@ -59,6 +59,7 @@ public void afterEach(ExtensionContext context) throws Exception {
 
   @Override
   public void afterAll(ExtensionContext extensionContext) throws Exception {
+    testRunner.clearAllExportedData();
     testRunner.afterTestClass();
   }